Chemistry, 11.07.2019 19:00, winterblanco
An element x has two isotopes. x–15 has 7 protons and 8 neutrons. determine the atomic number and mass number of the second isotope, which has 10 neutrons in its nucleus. a. atomic number = 8; mass number = 9 b. atomic number = 8; mass number = 17 c. atomic number = 7; mass number = 17 d. atomic number = 7; mass number = 15
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An element x has two isotopes. x–15 has 7 protons and 8 neutrons. determine the atomic number and ma...
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